US11794866B2 - Boat lifting gantry crane - Google Patents
Boat lifting gantry crane Download PDFInfo
- Publication number
- US11794866B2 US11794866B2 US16/761,035 US201716761035A US11794866B2 US 11794866 B2 US11794866 B2 US 11794866B2 US 201716761035 A US201716761035 A US 201716761035A US 11794866 B2 US11794866 B2 US 11794866B2
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- US
- United States
- Prior art keywords
- carriage
- carriages
- crane according
- stroke
- crane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C3/00—Launching or hauling-out by landborne slipways; Slipways
- B63C3/06—Launching or hauling-out by landborne slipways; Slipways by vertical movement of vessel, i.e. by crane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C19/00—Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries
- B66C19/005—Straddle carriers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
- B60P3/06—Vehicles adapted to transport, to carry or to comprise special loads or objects for carrying vehicles
- B60P3/10—Vehicles adapted to transport, to carry or to comprise special loads or objects for carrying vehicles for carrying boats
- B60P3/1091—Vehicles adapted to transport, to carry or to comprise special loads or objects for carrying vehicles for carrying boats by suspending the boat, e.g. straddle trucks or trailers
Definitions
- the present disclosure lies in the field of boat lifting gantry cranes, also identified in the sector as boat lifting portal crane.
- Boat lifting gantry cranes are large steel structures that as a whole have the shape of a quadrilateral.
- These cranes comprise an upper frame and a lower frame: the upper frame comprises two horizontal longitudinal upper beams which are mutually connected by a cross-member, which is also horizontal, arranged at one end of the beams, so as to form a U-shaped upper frame; the lower frame usually has at least four vertical legs, connected to the beams and/or to the cross-member, which are provided with carriages with wheels for resting on the ground. Furthermore, the lower frame can also comprise secondary beams which mutually connect the legs, so as to strengthen the assembly.
- the cranes comprise pairs of carriages, between which lifting belts are extended which are adapted to receive the keel of the boat and to support it, thus suspending the boat for its movement and/or maintenance out of the water; for this purpose, each carriage of a same pair is supported by a respective upper beam.
- the expression “pair of carriages” is used therefore to reference two carriages connected with an opposite end of a same belt.
- Each carriage is preferably divided into two parts: an upper base, coupled to the corresponding beam, and a lower portion coupled to the belts: between the upper base and the lower portion there are elements with adjustable extension, which determine the distance between the two parts and ultimately the distance of the belts from the beams; in this manner it is possible to adjust in terms of height the position of a boat supported by the belts.
- each carriage and more specifically the upper base of each carriage, can be moved along a portion that is comprised in the respective beam in order to adjust, within certain limits, the position of the belts with respect to the position of the center of gravity of the load, i.e., the boat, so as to better balance the load on said belts.
- a dedicated actuation means is associated with each carriage and allows its movement along the beam for a certain limited stroke.
- the aim of the present disclosure is to provide a boat lifting gantry crane that solves the problems of the background art, overcoming the drawbacks and limitations of the background art described above and thus allowing to lift in the best possible way boats that have dimensions and weights that are even significantly mutually different.
- the present disclosure provides a crane that is more versatile in use.
- the disclosure also provides a crane that is capable of balancing the loads on the belts in a particularly effective manner.
- the disclosure further provides a crane that is capable of giving the greatest assurances of reliability and safety in use.
- a boat lifting crane comprising:
- the carriages can be moved so as to assume different positions along the upper beam; this allows to improve the versatility of the crane, which can therefore be used to lift boats having different lengths and different weight distributions.
- the free movement of the carriages along the beams also allows to optimize the load that acts on the crane.
- the carriages can in fact assume the optimum positions, depending on the position of the center of gravity of the load or of the boat to be lifted, at which a balanced distribution of the force discharged onto the belts of the carriages is obtained, with a beneficial result in terms of both load distribution and load balance.
- Each carriage is preferably provided with a device for detecting the position and/or load supported by the individual carriage, preferably of the relative position on the respective cross-member; these devices for detecting position and/or load are functionally connected to a control unit in order to control the position and/or load of the carriage.
- the control unit can also comprise an actuation unit, which is functionally connected to each drive unit of the individual carriage, so as to actuate its movement along the respective cross-member in order to adapt the distribution of the load and the balance thereof; preferably, these functionalities are performed at least partly by the control unit automatically.
- an actuation unit which is functionally connected to each drive unit of the individual carriage, so as to actuate its movement along the respective cross-member in order to adapt the distribution of the load and the balance thereof; preferably, these functionalities are performed at least partly by the control unit automatically.
- FIG. 1 is a side view of an embodiment of a boat lifting gantry crane according to the disclosure, taken along the sectional plane AA of FIG. 2 ;
- FIG. 2 is a top plan view of the crane of the preceding figure
- FIG. 3 is a front view of the crane of FIGS. 1 and 2 ;
- FIGS. 4 - 6 are side views of a beam of the crane of the preceding figures with the carriages in different operating positions;
- FIG. 7 is a top view of part of an adjustment system provided on the crane of FIGS. 1 - 3 ;
- FIG. 8 is a side view of a carriage of the crane of the preceding figures.
- the crane for boats preferably a boat lifting gantry crane, generally designated by the reference numeral 1 , comprises an upper frame 2 , which in turn comprises two upper beams 3 A, 3 B.
- the upper beams 3 A, 3 B are arranged parallel to each other and substantially horizontally in the condition in which the crane 1 is operational.
- the beams are preferably provided by means of steel structures.
- pairs of carriages 6 , 7 , 8 , 9 there are, in the illustrated nonlimiting example, four pairs of carriages 6 , 7 , 8 , 9 ; it is noted right now that generally speaking the pairs of carriages may also be two, three or more than four.
- Each carriage 6 A, 6 B; 7 A, 7 B; 8 A, 8 B; 9 A, 9 B of each pair 6 , 7 , 8 , 9 is mounted so that it can move on a respective upper beam 3 A, 3 B and can translate for a respective stroke portion, so that each pair of carriages 6 , 7 , 8 , 9 has a carriage 6 A, 7 A, 8 A, 9 A on one beam and the other carriage 6 B, 7 B, 8 B, 9 B on the other beam.
- At least one lifting belt 16 , 17 , 18 , 19 is extended between the two carriages 6 A, 6 B; 7 A, 7 B; 8 A, 8 B; 9 A, 9 B of a same pair 6 , 7 , 8 , 9 ; in the preferred embodiment, for each pair of carriages 6 , 7 , 8 , 9 , there are four lifting belts, but more generally their number varies according to the requirements.
- At least part of the stroke portion (Cr) of a carriage 6 A, 6 B; 7 A, 7 B; 8 A, 8 B; 9 A, 9 B of a pair of carriages is superimposed on at least part of the stroke portion of a carriage 6 A, 6 B; 7 A, 7 B; 8 A, 8 B; 9 A, 9 B of another pair 6 , 7 , 8 , 9 of carriages.
- each carriage for example 6 A
- each carriage could move freely along a theoretical stroke (Ct) which substantially coincides with the entire longitudinal length of the respective beam 3 A, 3 B
- the actual stroke (Cr) of the individual carriage 6 A, 6 B; 7 A, 7 B; 8 A, 8 B; 9 A, 9 B is limited by two stroke limit positions that are defined by the space occupation of the other carriages that are present on the respective beam 3 A, 3 B and by the length of said beam 3 A, 3 B and/or, as in the illustrated example, by the ends of the reaction element 19 A, which will be described in greater detail hereinafter.
- the carriages in order to suspend very short boats, it is sufficient to move the carriages mutually closer, reducing the overall distance between the belts, or, if there is a boat with a center of gravity that is shifted toward one end of the beams, it is sufficient to move the carriages so as to support the load in a balanced manner, for example by providing the placement of most of the carriages close to the center of gravity, so as to distribute the weight of the boat on a plurality of belts.
- the beams 3 A, 3 B of the upper frame 2 are connected by a cross-member 20 which is coupled to the beams 3 A, 3 B at an end portion thereof; whereas in other embodiments the cross-member can be arranged along the beams 3 A, 3 B in a position that is different from the one shown in FIGS. 1 - 3 , for example in a central position.
- the crane 1 comprises, in addition to the upper frame 2 , also a lower supporting frame 5 which comprises vertical legs 10 and is connected to the upper frame 2 .
- the lower frame if present, is optionally provided with wheels 100 which are connected to the legs 10 , so as to render the crane 1 self-propelled.
- the lower frame 2 might be provided by means of fixed walls made of masonry which perform the role of the lower frame 5 and on which the beams 3 A, 3 B rest.
- actuation motors it is possible to connect actuation motors to the wheels 100 of the lower frame, if they are present. Some or all the wheels may be steerable, so as to render the crane movable along preferred trajectories, for example to move the boat easily into a dock where boat repair or restoration work is to be performed.
- the translational motion of the individual carriage 6 A, 6 B; 7 A, 7 B; 8 A, 8 B; 9 A, 9 B in its stroke along the respective beam 3 A, 3 B is allowed by at least one translation means (preferably a wheel, a slider, a sliding block or the like and optionally a combination thereof) provided on each carriage.
- at least one translation means preferably a wheel, a slider, a sliding block or the like and optionally a combination thereof
- the movement of the carriages is allowed and occurs only without the load: the purpose is to arrange the lifting belts in order to lift the load in the best way.
- each beam 3 A, 3 B comprises a translation support 13 A, 13 B that is designed to support, in a manner that allows translation (by rolling or sliding), each carriage by cooperating with the respective translation means (the wheel or the slider or the sliding block thereof); said translation support 13 A, 13 B is preferably common for all carriages 6 A, 7 A, 8 A, 9 A; 6 B, 7 B, 8 B, 9 B of the same beam 3 A; 3 B, which therefore all move on the same translation support 13 A; 13 B.
- the support might be a rail or a track or a sliding plate and the wheel might be shaped so as to engage it or might be a resting or contact surface on which the slider or sliding block slides.
- An actuation device 15 is provided in order to cause the movement of the individual carriages 6 A, 7 A, 8 A, 9 A; 6 B, 7 B, 8 B, 9 B in their stroke along the beam 3 A, 3 B; said device can be (alternately or in combination) accommodated on board each carriage and/or on the frame.
- the actuation device 15 comprises a drive unit 18 on board each carriage 6 A, 6 B; 7 A, 7 B; 8 A, 8 B; 9 A, 9 B and at least one reaction element 19 A, 19 B for each beam 3 A, 3 B.
- the reaction element 19 A, 19 B is fixed, coupled to the respective beam 3 A, 3 B, and cooperates with the drive unit 18 of each carriage 6 A, 6 B; 7 A, 7 B; 8 A, 8 B; 9 A, 9 B in order to cause the movement of the latter along the respective stroke.
- Each drive unit 18 comprises an engagement element 20 which is connected to a driving shaft of a dedicated motor (for example an electric or hydraulic motor); in order to allow effective and precise movement of the carriages, preferably the reaction element 19 A, 19 B and the engagement element 20 are arranged to be coupled so that they can move with respect to each other by shape interference coupling.
- a dedicated motor for example an electric or hydraulic motor
- reaction element 19 A, 19 B is a chain and the engagement element 20 is a pinion designed to mesh with said chain.
- driven pinions 21 and 23 which are designed to keep the chain meshed on the pinion; for this purpose, the driven pinions 21 and 23 are arranged at a different height with respect to the pinion that is connected to the driving shaft, so that the chain performs approximately at least half a turn around the latter (preferably more than half a turn, as in FIG. 8 ), thus being stably meshed on the pinion 20 that is motorized by the motor 18 .
- the chain (or more generally the reaction element) is fixed with respect to the respective beam 3 A, 3 B and preferably is extended substantially along the entire length of the latter.
- each carriage there are respectively a rack and a sprocket configured to mesh with the rack.
- the assembly for actuating translation, of the chain type or of another type can be installed in the fixed part at the ends of the upper beams 3 A and 3 B.
- FIG. 8 shows a carriage 6 A, the other carriages being substantially identical.
- the carriage 6 A comprises an upper base 61 A, which is coupled to the respective beam 3 A, and a lower portion 62 A, which is coupled to the respective lifting belt 16 .
- the upper base 61 A and the lower portion 62 A are coupled adjustably by virtue of coupling elements with adjustable extension 63 A, so that the distance between the upper base 61 A and the lower portion 62 A is adjustable: this ultimately causes the adjustment of the belts and therefore the lifting of the load suspended by them.
- the coupling elements with adjustable extension 63 A comprise:
- each pulley assembly 64 A and 65 A comprises a pair of individual pulleys, but there might be also a single pulley or three or more, as needed.
- the lower portion 62 A can be moved vertically and suspended with respect to the upper base 61 A by means of the cable 66 A.
- the crane 1 comprises an adjustment system 50 which is designed to act on said cable 66 A of each carriage, so as to vary its length and therefore vary the distance of the lower portion 62 A from the base 61 A.
- the adjustment system 50 comprises first guiding pulleys 66 C and a motorized winch 66 B for winding the cable 66 A.
- each carriage there is a respective cable 66 A which is guided from the first guiding pulleys 66 C arranged on the respective beam to the motorized winch 66 B arranged in the lower part of the crane.
- the crane according to the present disclosure achieves the intended aim and objects, since it allows to render the crane more versatile, making it capable of lifting boats of even very different dimensions without this entailing an imbalance of the load or unsafe lifting.
- Another advantage of the crane according to the disclosure relates to the possibility to balance the loads in an optimum manner.
- the materials used may be any according to the requirements.
Abstract
Description
-
- an upper frame, which in turn comprises two upper beams,
- at least two pairs of carriages, each carriage of each pair being mounted so that it can move on a respective upper beam and can translate for a respective stroke portion,
- at least one lifting belt, which is extended between two carriages of a same pair of carriages,
- wherein at least part of the stroke portion of a carriage of a pair of carriages is superimposed on at least part of the stroke portion of a carriage of another pair of carriages.
-
- a
first pulley assembly 64A, associated with theupper base 61A - a
second pulley assembly 65A, associated with thelower portion 62A - a
cable 66A which is engaged by thepulley elements
- a
Claims (10)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2017/056867 WO2019086936A1 (en) | 2017-11-03 | 2017-11-03 | Boat lifting gantry crane |
Publications (2)
Publication Number | Publication Date |
---|---|
US20210179241A1 US20210179241A1 (en) | 2021-06-17 |
US11794866B2 true US11794866B2 (en) | 2023-10-24 |
Family
ID=60782268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/761,035 Active 2038-10-26 US11794866B2 (en) | 2017-11-03 | 2017-11-03 | Boat lifting gantry crane |
Country Status (2)
Country | Link |
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US (1) | US11794866B2 (en) |
WO (1) | WO2019086936A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11766811B1 (en) | 2022-05-17 | 2023-09-26 | John Robert Larsen | Gel-foam body amalgamation system and method |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4236859A (en) * | 1978-05-22 | 1980-12-02 | Marine Travelift, Inc. | Mobile hoist |
US4861218A (en) * | 1984-02-16 | 1989-08-29 | Marine Travelift, Inc. | Mobile boat hoist |
US4880124A (en) * | 1988-04-22 | 1989-11-14 | Marine Travelift, Inc. | Straddle crane steering system |
US20060180375A1 (en) * | 2005-02-15 | 2006-08-17 | Wierzba Jerry J | Steering system for crane |
US20070095776A1 (en) * | 2005-10-31 | 2007-05-03 | Wierzba Jerry J | Panel turner for gantry crane |
US20150125207A1 (en) | 2011-12-30 | 2015-05-07 | Jung Sang Lee | Yacht lifting apparatus |
US20150203334A1 (en) * | 2014-01-17 | 2015-07-23 | Mi-Jack Products, Inc. | Crane Trolley and Hoist Position Homing and Velocity Synchronization |
KR101685324B1 (en) | 2016-02-05 | 2016-12-09 | (주)카네비컴 | Marine Mobile Lift |
US20190225263A1 (en) * | 2016-08-26 | 2019-07-25 | Cimolai Technology Spa | Method and system for steering a gantry crane |
-
2017
- 2017-11-03 WO PCT/IB2017/056867 patent/WO2019086936A1/en active Application Filing
- 2017-11-03 US US16/761,035 patent/US11794866B2/en active Active
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4236859A (en) * | 1978-05-22 | 1980-12-02 | Marine Travelift, Inc. | Mobile hoist |
US4861218A (en) * | 1984-02-16 | 1989-08-29 | Marine Travelift, Inc. | Mobile boat hoist |
US4880124A (en) * | 1988-04-22 | 1989-11-14 | Marine Travelift, Inc. | Straddle crane steering system |
US20060180375A1 (en) * | 2005-02-15 | 2006-08-17 | Wierzba Jerry J | Steering system for crane |
US20070095776A1 (en) * | 2005-10-31 | 2007-05-03 | Wierzba Jerry J | Panel turner for gantry crane |
US20090045156A1 (en) | 2005-10-31 | 2009-02-19 | Marine Travelift, Inc. | Panel turner for a gantry crane |
US20150125207A1 (en) | 2011-12-30 | 2015-05-07 | Jung Sang Lee | Yacht lifting apparatus |
US20150203334A1 (en) * | 2014-01-17 | 2015-07-23 | Mi-Jack Products, Inc. | Crane Trolley and Hoist Position Homing and Velocity Synchronization |
KR101685324B1 (en) | 2016-02-05 | 2016-12-09 | (주)카네비컴 | Marine Mobile Lift |
US20190225263A1 (en) * | 2016-08-26 | 2019-07-25 | Cimolai Technology Spa | Method and system for steering a gantry crane |
Non-Patent Citations (2)
Title |
---|
International Search Report dated Jul. 17, 2018 re: Application No. PCT/IB2017/056867, pp. 1-3, citing: US 2015/0125207 A1, KR 10-1685324 B1, US 2009/0045156 A1. |
Written Opinion dated Jul. 17, 2018 re: Application No. PCT/IB2017/056867, pp. 1-6, citing: US 2015/0125207 A1, KR 10-1685324 B1, US 2009/0045156 A1. |
Also Published As
Publication number | Publication date |
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US20210179241A1 (en) | 2021-06-17 |
WO2019086936A1 (en) | 2019-05-09 |
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